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Planet and Satellite

The diameter of a world is a significant value because, given the same densities, the surface gravity will vary roughly with the diameter. A diameter of 350 km is the approximate dividing line between the larger, near-spherical bodies and the smaller objects of irregular shape.

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Allison Pass

Allison Pass, elevation 1,352 metres, is located at kilometre 60, the highest point on the Hope-Princeton Highway (opened 1949) through the Cascade Mountains of southern British Columbia.

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Alfalfa

Alfalfa, or lucerne (genus Medicago), is a herbaceous perennial belonging to the legume family and grown as a forage crop.

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Amphibian

Amphibians are members of a group of tetrapod (4-legged) vertebrate animals derived from fishes, and are the common ancestor to mammals and reptiles.

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Boundaries

The political boundaries that are of concern to Canada today are the international boundaries primarily with the US and Greenland and, because they are of more than local importance, the boundaries of the provinces and territories. The evolution of both types involved 2 distinct stages. After political decisions were made on the allocation of territory, such territories were delimited and the boundaries described in state documents. Then, usually some time later, the boundaries were surveyed and marked on the ground (the process of demarcation).

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Québec's Postglacial Seas

Between about 100 000 and 12 000 years ago, the whole area of Québec as well as a major part of the northern hemisphere was covered with a thick layer of ice. In the late PLEISTOCENE era, just over 12 000 years ago, Québec underwent a gradual warming of the atmosphere.

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Hurricane Hazel

Hurricane Hazel struck the Toronto area on 15-16 October 1954, with devastating results. It was Canada's worst hurricane and Toronto's worst natural disaster. During the storm, winds reached 124 km/h and over 200 millimetres of rain fell in just 24 hours.

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Ice-Worm

Ice-Worm is a common name for Mesenchytraeus solifugus, a dark-pigmented oligochaete worm (see Annelida) up to 4 cm long, found in tangled masses in the melting ice of glaciers in the Pacific Northwest.

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Iceberg

An iceberg is a piece of ice that has become detached from its parent glacier by a process known as calving.

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Hydro-Québec

Hydro-Québec, a provincially owned corporation based in Montréal, is Canada's largest electric utility and, judged by assets ($30.6 billion in 1986), Canada's second largest corporation.

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Igneous Rock

Early formed, dense crystals may separate from the magma, causing a change in the composition of the residual melt.

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Osprey

The osprey (Pandion haliaetus) is a large, cosmopolitan bird of prey characterized by a crested head and contrasting black, white and grey plumage.

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Humane Societies

Humane societies are societies for the prevention of cruelty to animals (SPCA). Following a long struggle by Richard Martin, British landowner and parliamentarian, and others to secure legislation against cruelty to children and livestock, the first SPCA was begun in England in 1824.

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Indian Pipe

Indian Pipe (Monotropa uniflora), a perennial plant, is the only native species of genus Monotropa found in Canada.

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Invertebrate

Invertebrates are animals without a vertebral column (backbone). As a group, invertebrates are extremely diverse.

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Irish Moss

Irish moss is Canada's most valuable commercial seaweed. Originally used in blancmanges and milk jellies, it is still available in "natural food" stores. The dried plants are used to clarify beers, wines, coffee and honey.

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